Vol. 43 No. 1, January 2002

In Memory of Professor Junichiro Itani ..........1

Kipper, Silke.; Todt, Dietmar.: The Use of Vocal Signals in the Social Play of Barbary Macaques ..........3 Key Words: Macaca sylvanus; Social Play; Play signals; Vocalization.

Wich, S. A,: Fredriksson, G.; Sterck, E. H. M.: Measuring Fruit Patch Size for Three Sympatric Indonesian Primate Species ..........19 Key Words: Orangutan; Long-tailed macaque; Thomas langur; Food availability; Food patch size; Food competition.

Barrett, Gordon M.; Shimizu, Keiko; Bardi, Massimo; Mori, Akio: Fecal Testosterone Immunoreactivity as a Non-invasive Index of Functional Testosterone Dynamics in Male Japanese Macaques (Macaca fuscata) ..........29 Key Words: Testosterone; Fecal steroids; Japanese macaques; Macaca fuscata.

Zamma, Koichiro: Grooming Site Preferences Determined by Lice Infection among Japanese Macaques in Arashiyama ..........41 Key Words: Grooming; Ectoparasites; Hygienic function; Macaca fuscata; Lice.

Estrada, Alejandro; Castellanos, Lucía; Garcia, Yasminda; Franco, Berenice; Muñoz, David; Ibarra, Ana; Rivera, Andromeda; Fuentes, Eugenio; Jimenez, Carlos: Survey of the Black Howler Monkey, Alouatta Pigra, Population at the Mayan Site of Palenque, Chiapas, Mexico ..........51 Key Words: Alouatta pigra; Palenque; Mexico; Population; Black howler monkey; Mesoamerica; Neotropical primates.

Warner, Mark D.: Assessing Habitat Utilization by Neotropical Primates: A New Approach ..........59 Key Words: Primates; Tropical forest; Peru; Habitat; Forest structure; Forest strata.

Kawakami, Kiyobumi; Tomonaga, Masaki; Suzuki, Juri: The Calming Effect of Stimuli Presentation on Infant Japanese Macaques (Macaca fuscata) under Stress Situation: A Preliminary Study ..........73 Key Words: Infant Japanese macaques; Stress; Cortisol.

Short Communication

Zamma Koichiro: Leaf-grooming by a Wild Chimpanzee in Mahale ..........87 Key Words: Leaf-grooming; Louse; Chimpanzees; Pan troglodytes; Mahale; Culture.

Book Review ..........91